We analyse the production of a Higgs boson in association with a top--antitop-quark pair in the Standard Model at the LHC. Considering the final state consisting of four b jets, two jets, one identified charged lepton and missing energy, we examine the irreducible background for the production rate and several kinematical distributions. While ttH production and decay is roughly a fourth of the full process for the final state specified above, ttbb production constitutes the main contribution with about 92%. Surprisingly, interference effects result in a reduction of the cross-section by five per cent. Furthermore, we consider NLO QCD corrections for the production of a Higgs boson, two charged leptons, two neutrinos, and two b jets. We discuss the size of the corrections and the scale dependence for the integrated cross section and different distributions. For the integrated cross section we find a K factor of 1.17 and a reduction of the scale dependence from 30% at leading order to 5% at next-to-leading order.
@article{arxiv.1511.09344,
title = {Precise predictions for Higgs-boson production in association with top quarks},
author = {Ansgar Denner and Robert Feger and Andreas Scharf},
journal= {arXiv preprint arXiv:1511.09344},
year = {2015}
}
Comments
10 pages, 3 figures, to appear in the Proceedings of the 12th International Symposium on Radiative Corrections (Radcor 2015) and LoopFest XIV (Radiative Corrections for the LHC and Future Colliders), UCLA, Los Angeles, USA, 2015